To use this extension, u can click that camera icon. Then will be three option: screenshot only webpage that u can see in your monitor screen, screenshot all of that webpage even u cant see its in your monitor screen and Beta: edit Content.

For edit a webpage before u screenshot its, u can click option Beta: Edit Content. Then will appear windows “you can edit this page”. Click Ok. Now u can edit that web page or may be u want to be “naughty” by edit and printscreen your friends socialnetwork page.😀